package com.xyz.util;

import java.net.InetAddress;
import java.net.UnknownHostException;

import javax.servlet.http.HttpServletRequest;

import org.apache.commons.lang.StringUtils;

import com.xyz.init.infos.ConfigInit;

/**
 * ip鉴权
 * 
 * @author xyzjh
 * 
 */
public class IPAuthentication {
	public static String getIpAddr(HttpServletRequest request) {
		String ipAddress = null;
		// ipAddress = request.getRemoteAddr();
		ipAddress = request.getHeader("x-forwarded-for");
		if (ipAddress == null || ipAddress.length() == 0
				|| "unknown".equalsIgnoreCase(ipAddress)) {
			ipAddress = request.getHeader("Proxy-Client-IP");
		}
		if (ipAddress == null || ipAddress.length() == 0
				|| "unknown".equalsIgnoreCase(ipAddress)) {
			ipAddress = request.getHeader("WL-Proxy-Client-IP");
		}
		if (ipAddress == null || ipAddress.length() == 0
				|| "unknown".equalsIgnoreCase(ipAddress)) {
			ipAddress = request.getRemoteAddr();
			if (ipAddress.equals("127.0.0.1")) {
				// 根据网卡取本机配置的IP
				InetAddress inet = null;
				try {
					inet = InetAddress.getLocalHost();
				} catch (UnknownHostException e) {
					e.printStackTrace();
				}
				ipAddress = inet.getHostAddress();
			}

		}

		// 对于通过多个代理的情况，第一个IP为客户端真实IP,多个IP按照','分割
		if (ipAddress != null && ipAddress.length() > 15) { // "***.***.***.***".length()
															// = 15
			if (ipAddress.indexOf(",") > 0) {
				ipAddress = ipAddress.substring(0, ipAddress.indexOf(","));
			}
		}
		return ipAddress;
	}

	/**
	 * ip是否有权限
	 * @param request
	 * @return
	 */
	public static boolean havaPri(HttpServletRequest request) {
		String whiteIP = ConfigInit.getConfigValue("sys_access_ip");
		if (!StringUtils.isBlank(whiteIP)) {
			String[] ips = whiteIP.split("\\|");
			String realIp = getIpAddr(request);
			for (String ip : ips) {
				if (ip.equalsIgnoreCase(realIp)) {
					return true;
				}
			}

		}
		return false;
	}
}
